Fix memory leak in owner (#2245)

* Fix: memory leak on listeners for elements

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Co-authored-by: Evan Almloff <evanalmloff@gmail.com>

packages/desktop/Cargo.toml

@@ -70,7 +70,7 @@ core-foundation = "0.9.3"
 objc = "0.2.7"
 
 [features]
-default = ["tokio_runtime", "wry/objc-exception", "hot-reload"]
+default = ["tokio_runtime", "wry/objc-exception", "hot-reload", "devtools"]
 tokio_runtime = ["tokio"]
 fullscreen = ["wry/fullscreen"]
 transparent = ["wry/transparent"]